Books
Gerald G. Briggs. Drugs in Pregnancy and Lactation: A Reference Guide to Fetal and Neonatal Risk. 5th ed. Baltimore: Williams & Wilkins, 1998.
Thomas W. Hale. Medications and Mothers' Milk. 8th ed. Amarillo, Tex.: Pharmasoft Medical Publishing, 1999.
Thomas W. Hale. Clinical Therapy in Breastfeeding Patients. Amarillo, Tex.: Pharmasoft Medical Publishing, 1999.
Ruth Lawrence. Breastfeeding: A Guide for the Medical Profession. 5th ed. St. Louis: Mosby, 1999.
Jack Newman, Theresa Pitman. Dr. Jack Newman's Guide to Breastfeeding. Toronto: Harper Collins Publishing, 2000.
Telephone advice
Yale-New Haven Hospital Lactation Center: 716–275–0088 (9 a.m. to 5 p.m. EST weekdays)
Internet resources
Dr. Hale's Breastfeeding Pharmacology Page (http://www.neonatal.ttuhsc.edu/lact)
Case Western Reserve University (http://www.breastfeedingbasics.org)